Yeah, before I tried it I envisioned some kind of VLC-like interface... but no, I installed it and it requires a key be input to identify and it goes fullscreen.. oh well, the browser app and mobile apps are fine.
It seems to work... not amazing, but okay, in windowed mode (settings, disable fullscreen). It still needs a "not ten foot" mode and proper scroll wheel support, but the mouse actually works with it by default, and it seems to have finally fixed the previously XBMC-derived trait of hidden menus and options with no on-screen controls for them.